2 * Copyright (C) 2016 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <dm/device-internal.h>
14 int blk_first_device(int if_type, struct udevice **devp)
16 struct blk_desc *desc;
19 ret = uclass_first_device(UCLASS_BLK, devp);
25 desc = dev_get_uclass_platdata(*devp);
26 if (desc->if_type == if_type)
28 ret = uclass_next_device(devp);
36 int blk_next_device(struct udevice **devp)
38 struct blk_desc *desc;
41 desc = dev_get_uclass_platdata(*devp);
42 if_type = desc->if_type;
44 ret = uclass_next_device(devp);
49 desc = dev_get_uclass_platdata(*devp);
50 if (desc->if_type == if_type)
55 int blk_get_device(int if_type, int devnum, struct udevice **devp)
61 ret = uclass_get(UCLASS_BLK, &uc);
64 uclass_foreach_dev(dev, uc) {
65 struct blk_desc *desc = dev_get_uclass_platdata(dev);
67 debug("%s: if_type=%d, devnum=%d: %s, %d, %d\n", __func__,
68 if_type, devnum, dev->name, desc->if_type, desc->devnum);
69 if (desc->if_type == if_type && desc->devnum == devnum) {
71 return device_probe(dev);
78 unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start,
79 lbaint_t blkcnt, void *buffer)
81 struct udevice *dev = block_dev->bdev;
82 const struct blk_ops *ops = blk_get_ops(dev);
88 if (blkcache_read(block_dev->if_type, block_dev->devnum,
89 start, blkcnt, block_dev->blksz, buffer))
91 blks_read = ops->read(dev, start, blkcnt, buffer);
92 if (blks_read == blkcnt)
93 blkcache_fill(block_dev->if_type, block_dev->devnum,
94 start, blkcnt, block_dev->blksz, buffer);
99 unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
100 lbaint_t blkcnt, const void *buffer)
102 struct udevice *dev = block_dev->bdev;
103 const struct blk_ops *ops = blk_get_ops(dev);
108 blkcache_invalidate(block_dev->if_type, block_dev->devnum);
109 return ops->write(dev, start, blkcnt, buffer);
112 unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
115 struct udevice *dev = block_dev->bdev;
116 const struct blk_ops *ops = blk_get_ops(dev);
121 blkcache_invalidate(block_dev->if_type, block_dev->devnum);
122 return ops->erase(dev, start, blkcnt);
125 int blk_prepare_device(struct udevice *dev)
127 struct blk_desc *desc = dev_get_uclass_platdata(dev);
134 int blk_create_device(struct udevice *parent, const char *drv_name,
135 const char *name, int if_type, int devnum, int blksz,
136 lbaint_t size, struct udevice **devp)
138 struct blk_desc *desc;
142 ret = device_bind_driver(parent, drv_name, name, &dev);
145 desc = dev_get_uclass_platdata(dev);
146 desc->if_type = if_type;
148 desc->lba = size / blksz;
149 desc->part_type = PART_TYPE_UNKNOWN;
151 desc->devnum = devnum;
157 int blk_unbind_all(int if_type)
160 struct udevice *dev, *next;
163 ret = uclass_get(UCLASS_BLK, &uc);
166 uclass_foreach_dev_safe(dev, next, uc) {
167 struct blk_desc *desc = dev_get_uclass_platdata(dev);
169 if (desc->if_type == if_type) {
170 ret = device_remove(dev);
173 ret = device_unbind(dev);
182 UCLASS_DRIVER(blk) = {
185 .per_device_platdata_auto_alloc_size = sizeof(struct blk_desc),